Bluetooth 4.0 Hands-Free Car Kit for Cars with 3.5 mm Aux Input Jack;Bluetooth 4.0 Music Receiver for cars.Features:Private call and Hands-Free call are available. Built-in Microphone.Convenient Siri / Voice ActivationAuto-connect with last paired device.Two-link: can connect two Bluetooth devices simultaneously.Charge your favorite devices while listening to music via USB port. Specifications:Bluetooth Version: V4.0Frequency Range: 2.4GHzOutput Power Category: Class2Support Bluetooth Profile: HFP/HSP/A2DP/AVRCPBluetooth Range: Up to 30 feetCharging Input: DC 12V-24VCharging Output: Single charging for 5V/2.1A or double charging for 5V/1A per PortThe distance between the USB and 3.5mm connector:Not less than 2.5 feet How to use1. Before using the receiver for the first time， you must pair it with your phone.2. Connect the receiver to the car charger， plug the car charger into the cigarette socket， the blue indicator light will start to flash quickly.3. Turn on the Bluetooth function of your mobile phone.4. Search for the Bluetooth devices and select "Link- BT4808".5. Enter the code "0000" if needed.6. If paring is successful， the blue light will be bright constantly .Package Detail:1x Bluetooth4.0 Receiver1x Car charger1x User Manual